{"title":"Monte Carlo Modeling and Tuning in CMS","authors":"G. Onsem","doi":"10.22323/1.390.0515","DOIUrl":null,"url":null,"abstract":"The underlying event in a proton-proton collision consists of multiple-parton interactions and beam remnants, which typically involve low energy scales. The modeling of these aspects of a collision is not always calculable in perturbative quantum chromodynamics, and is governed by phenomenological parameters that need to be \"tuned\" to observed data. The results of such an underlying-event tuning performed by the CMS experiment for the Pythia 8 and Herwig 7 generators are presented. Various assumptions in the proton parton distribution functions and parton shower development are tested. The derived tunes are validated using data of a wide range of physics processes, and provide a good description of CMS data at a center-of-mass energy √ s = 13 TeV.","PeriodicalId":20428,"journal":{"name":"Proceedings of 40th International Conference on High Energy physics — PoS(ICHEP2020)","volume":null,"pages":null},"PeriodicalIF":0.0000,"publicationDate":"2021-02-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Proceedings of 40th International Conference on High Energy physics — PoS(ICHEP2020)","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.22323/1.390.0515","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
引用次数: 0
Abstract
The underlying event in a proton-proton collision consists of multiple-parton interactions and beam remnants, which typically involve low energy scales. The modeling of these aspects of a collision is not always calculable in perturbative quantum chromodynamics, and is governed by phenomenological parameters that need to be "tuned" to observed data. The results of such an underlying-event tuning performed by the CMS experiment for the Pythia 8 and Herwig 7 generators are presented. Various assumptions in the proton parton distribution functions and parton shower development are tested. The derived tunes are validated using data of a wide range of physics processes, and provide a good description of CMS data at a center-of-mass energy √ s = 13 TeV.
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